Augustus h



(No Model.)

A. H. JONES.

WIOK ADJUSTING DEVICE FOR CENTRAL DRAFT LAMPS.

No. 541,281. Patented June 18, 1895.

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UNITED STATES PATENT OFFICE.

AUGUSTUS H. JONES, OF MERIDEN, CONNECTICUT, ASSIGNOR TO THE MERIDENBRONZE COMPANY, OF SAME PLACE.

WlCK-ADJUSTING DEVICE FOR CENTRAL-DRAFT LAMPS.

SPECIFICATION formingpart of Letters Patent No. 541,281, dated June 18,1895.

Application filed F r ary 4, 1895. Serial No. 537,189. on model.)

To all whom it may concern.-

Be it known that i, AUGUSTUS H. JONES, of Meriden, in the county of NewHaven and State of Connecticut, have invented a new Improvement inWick-Adjusting Devices for Central-D raft Lamps; and I do hereby declarethe following, when taken in connection with the accompanying drawingand the letters of reference marked thereon, to be a full, clear, andexact description of the same, and which said drawing constitutes partof this specification, and represents a view, partly in elevation andpartly in section, of one form which a wick-adjusting device constructedin accordance with my invention may assume.

My invention relates to an improvementin that class of wick-adjustingdevices for central draft lamps which provides for the direct plungingand lifting of the wick through the medium of a draw-bar, and a fineadjustment of the wick through the medium of arotatable finger-button,the object of my present invention being to produce a simple, compact,and effective device of the character described, designed withparticular reference to cheapness and facility in construction andassemblance of its parts.

With these ends in view, my invention consists in a wick-adjustingdevice having certain details of construction and combinations of partsas will be hereinafter described, and pointed out in the claims.

In carrying out my invention, I employ a tubular screw A, having anexternal screw-. thread A', of coarse pitch formed in it in any approvedmanner, as by indenting it, and extending substantially throughout itslength,-

though terminating below its upper end, where the tube has acircumferential recess A formed in it in any desired manner, at a rightangle to its longitudinal axis; but however made, the tube will beuniform in diameter, or substantially so, throughout its entire length.As herein shown, the tube is drawn with its lower end closed, and itsupper end open, but I do not limit myself to that construction. The saidtube is suspended in the lamp-fount B by means of a suspension nut, asherein shown, formed from a single piece of sheet-metal, and comprisinga knurled overhanging edge or flange C, an exterioi'ly threaded shank C,and acen'tral downwardly extending hub C the lower edge of which is spuninto the circumferential recess A formed in the upper end of the tube,as before described, whereby thetube is connected with the suspensionnutin which it is free to rotate in either direction, but in which it isheld against longitudinal movement. The shank C of the suspension nut isscrewed into an internally threaded nipple B, mounted in the lamp-fount,in the usual manner, the knurled flange C of the nut resting upon theflanged upper edge of the said nipple.

It will be understood that the internal diameter of the hub C of thesuspension nut, practically corresponds to the external diameter of thetubular screw which projects above the upper face of the nut.

The screw is rotated in one direction or the other by means of a knurledfinger-button D, constructed in its lower face with a centrallyarranged, circular counter-bore or recess D, corresponding in diameterto the external diameter of the screw A, the projecting upper end ofwhich is entered into the said recess,

and soldered or otherwise secured thereinto, so that the finger'buttonbears, directly or indirectly, upon the upper face of the suspensionnut,from which it is, by preference, separated the suspension nut and screw,and then spin the edge of the hub of the not into the circumferentialrecess of the screw. Then I shall pass the washer over the projectingupper end of the screw, and then apply the finger-button to theprojecting end of the screw, to which I shall secure it by soldering, orotherwise.

The screw may be connected with the wick for the fine adjustmentthereof, in any approved manner. As herein shown, the wick is carriedupon the central draft-tube by a wick-band F, having a horizontallyarranged socket F, receiving the inner end of a horizontally arrangedreach G, the outer end of which has secured to it a vertically arranged,

short, sheet-metal collar G, having a short internal thread Gcorresponding in pitch to the thread A of the tubular screw A, intowhich the thread G takes.

It will be obvious that when the tubular 5 screw is rotated in onedirection or the other, the said collar G and the reach G, and hence thewick-band, will be raised and lowered. I do not, however, limit myselfto the particular means shown and described for connecting the IOwick-band F with the tubular screw.

For the direct adjustment of the wick by plunging and lifting the same,I employ a straight, vertically movable draw-bar H, having bearing in ashort sleeve B mounted in the top of the lam p-fount. The lower end ofthis bar is threaded, and enters a vertically threaded opening G formedin the horizontal reach G. The upper end of the bar H, projects upwardabove the lamp-fount in position to be engaged by the fingers for beingpushed downward for plunging the wick, or being lifted for raising thesame. WVhen the draw-bar is pushed downward for plunging the wick, thetubular screw A and its fingerbutton D, are forced to idly rotate in onedirection, while when the draw-bar is lifted for directly raising thewick, the screw and fingerbutton are obliged to idly rotate in theopposite direction.

The described idle rotation of the tubular screw and finger-button whenthe wick is being plunged or lifted, does not practically hamper themanipulation of the draw-bar, because the pitch of the thread A of thetubular screw A, and the pitch of the thread G of the threaded collar G,is so coarse that the tubular screw responds and turns under the upwardor downward draft of the collar. As herein shown the draw-bar has areversed 4o end H, which extends downward into the upper end of thetubular screw A, through a central opening D formed in the finger-buttonD. The reversed end of the draw-bar as thus arranged, serves to steadyand guide the same, and I prefer to employ such a construction, but thatis not necessary, for the said reversed end may be dispensed with, andthe upper end of the draw-bar provided with a knob H as indicated bybroken lines.

If desired, the draw-bar may be removed and discarded altogether, as forinstance, when the. wick is short, and the draw-bar has to be lifted sohigh as to interfere with the globe-holder; but the removal of the draw-bar under my construction, in nowise interferes with the perfectaction of the tubular screw for raising and lowering the wick, theaction of the draw-bar and screw being entirely independent of eachother, except so far as the finger-button in the construction shown,serves to guide and steady the draw-bar.

In view of the changes suggested, and of others which may obviously bemade,I would have it understood that I do not limit myself i to theexact construction herein shown and described, but hold myself atliberty to make such changes and alterations as fairly fall within thespirit and scope of my invention.

Having fully described myinvention, what I claim as new, and desire tosecure by Letters Patent, is

1. In a wick-adjusting device for centraldraft lamps, the combinationwith an externally threaded, sheet-metal, tubular screw of uniform orsubstantially uniform diameter throughout its length, and constructednear its upper end with a circumferential recess; of a wick-carrier withwhich the screw is connected through-the medium of its external threads,a suspension-nut having a centrally 8 dependinghub, the edge of which isspun into the circumferential recess formed in the screw, whereby thenut and screw are swiveled together, and a finger-button having itslower face recessed to receive the projecting upper end of the screwover which it fits and to which it is rigidly secured, so as to bearupon the said suspension nut, substantially as described.

2. In awick-adjusting device for centralqo draft lamps, the combinationwith an externally threaded, sheet-metal, tubular screw of uniform orsubstantially uniform diameter throughout its length, of a wick-carrierwith which the screw is connected through the 5 medium of its externalthreads, a suspension nut in which the screw is swiveled, and abovewhich the screw projects, a finger-button having its lower face recessedto receive the projecting upper end of the screw over which it ace fitsand to which it is rigidly secured so as to bear upon the said nut, anda draw-bar having bearing in the lamp-fount, connected at its lower endwith the wick-carrier independently of the connection of the same withthe :05 external threads of the screw and having its upper end reversedand extended downward into the upper end of the tubular screw through acentral opening formed in the finger-button, which forms a bearing foritsub- 1 IO stantially as described.

In testimony whereof I have signed this specification in the presence oftwo subscribing witnesses.

' AUGUSTUS. I-I. JONES. lVitnesses: t

E. A. MERRTMAN, D. S. DALTON.

